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  1. iopscience.iop.org

    Relativistic corrections to the growth of structure in modified gravity. Guilherme Brando 1,2, Kazuya Koyama 2 and David Wands 2. ... As an example, we study the impact of relativistic corrections on the matter power spectrum in k-essence, a subclass of Horndeski theory, including the effects of massless and massive neutrinos.
  2. pdfs.semanticscholar.org

    1. We aim to minimize non-linear corrections at early stages. Initiate simulations at higher redshifts 2. At higher redshifts, the bigger the relativistic effects of photons, neutrinos are, as well as more relativistic space-time itself is. Motivation -Simulations (2)
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  4. inspirehep.net

    For massive neutrinos with ∑ mν = 0.1 eV, the corrections due to relativistic species (photons, neutrinos and dark energy) can introduce a maximum deviation of approximately 7% to the power spectrum at k ∼ 10−3 Mpc−1 at z=0, for a scalar field with sound speed cs2∼0.013 during matter domination epoch.
  5. semanticscholar.org

    We present a method to introduce relativistic corrections including linear dark energy perturbations in Horndeski theory into Newtonian simulations based on the N-body gauge approach. We assume that standard matter species (cold dark matter, baryons, photons and neutrinos) are only gravitationally-coupled with the scalar field and we then use the fact that one can include modified gravity ...
  6. As an example, we study the impact of relativistic corrections on the matter power spectrum in k-essence, a subclass of Horndeski theory, including the e ects of massless and massive neutrinos. For massive neutrinos with P m = 0:1 eV, the corrections due to relativistic species (photons, neutrinos and dark energy) can introduce a maximum devia-
  7. researchgate.net

    We consider two different modified gravity models in which the growth of structure is enhanced or suppressed at small scales, and show that the response function with respect to the change of ...
  8. researchgate.net

    However, dark energy perturbations and relativistic corrections can lead to differences relative to Newtonian N-body simulations at the tens of percent level for scales k < (10−3-10−2) Mpc ...
  9. researchportal.port.ac.uk

    Relativistic corrections to the growth of structure in modified gravity. Guilherme Brando, Kazuya Koyama, ... Cosmological Tests of Gravity. Koyama, K. European Research Council. 1/09/15 → 31/08/20. ... Scalar-Tensor-Vector Gravity 43%. General Relativity 42%. simulation 32%. space 32%. Powered by Pure, Scopus & Elsevier Fingerprint Engine ...
  10. link.springer.com

    Aug 13, 2023Bhatti et al. [31,32,33] worked out to under stand the dynamical behavior of self-gravitating compact structures with an anisotropic environment with f(R, T) theory. They applied radial perturbation scheme studied the effects of extra curvature terms which appear due to modified f(R, T) gravity model in both the Newtonian and Post Newtonian eras.

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